IMPORTANT:

"Postmarked" means that it must be delivered by the close of business on that date to your local postoffice. It is OK for your application to arrive serveral days later in Blacksburg, Virginia. There is no need for overnight shipping, etc. You can send your application by FIRST CLASS mail if you wish.

If you cannot get an official transcript in time for the postmarked deadline, then you can include an unofficial transcript with your application,
and then later mail your official transcript seperately when you receive it.